Andreas Kazantzidis is the Head of Laboratory of Atmospheric Physics and Professor in the Physics Department, University of Patras, Greece. His main research activities focus on solar resource and forecasting with the extensive use of radiative transfer models in synergy with ground-based and satellite measurements. His experimental activities include measuring of solar broadband/spectral radiation using various types of instruments, monitoring of atmospheric parameters as well as data analysis, quality control and reliability of atmospheric measurements. He participates in IEA PVPS Task, dedicated to solar resource for high penetration and large scale applications.